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All Journal Bulletin of Electrical Engineering and Informatics JURNAL ILMU PERTANIAN Science and Technology Indonesia Abdimas Talenta : Jurnal Pengabdian Kepada Masyarakat SCIENTIA JOURNAL Eksakta : Berkala Ilmiah Bidang MIPA Teknologi Indonesia Indonesian Physical Review Journal of Technomaterial Physics Multidiciplinary Output Research for Actual and International Issue (Morfai Journal) Mechanical Engineering for Society and Industry JUITECH: Jurnal Ilmiah Fakultas Teknik Universitas Quality PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Prisma Sains: Jurnal Pengkajian Ilmu dan Pembelajaran Matematika dan IPA IKIP Mataram Makara Journal of Technology
Erna Frida
Department Of Physics, Faculty Of Mathematics And Natural Sciences – Universitas Sumatera Utara, Jl. Dr. T. Mansur No.9, Padang Bulan, Kec. Medan Baru, Kota Medan, Sumatera Utara
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The Effect of Rice Husk Ash and Pineapple Leaf Fiber on Physical and Mechanical Properties of Concrete Atikah, Nisrina; Frida, Erna; Nasution, Yulianti
Journal of Technomaterial Physics Vol. 5 No. 1 (2023): Journal of Technomaterial Physics
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jotp.v5i1.10325

Abstract

This study used the cast-in-situ method to make concrete based on rice husk ash and pineapple leaf fiber. Rice husk ash and pineapple leaf fiber were used as the cement substitutes with different variations: 0%, 2.5%, 5%, and 7.5%. Parameters examined in this study included density, porosity, water absorption, flexural strength, and compressive strength using a universal testing machine and Material Testing equipment, which were then analyzed morphologically using SEM-EDX. The result showed a density of  2.510 × 103 − 2.451 × 103 kg/m3, porosity of 7.64 – 5.73 %, water absorption of 0.296 % – 0.243 %, compressive strength of 23.66 – 16.45 MPa, flexural Strength of 33.3 – 25.3 MPa. The morphological analysis showed that the rice husk ash and pineapple leaf fiber addition was responsible for the concrete's porous structure in this study has a porous structure. The EDX analysis result exhibited a high carbon percentage.
Manufacturing and Characterization of Composite Boards from Corn Husk Fiber, Water Hyacinth Fibers, and Sawdust Using Epoxy Resin Frida, Erna; Pratyka, Venna
Journal of Technomaterial Physics Vol. 6 No. 1 (2024): Journal of Technomaterial Physics
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jotp.v6i1.13824

Abstract

Composite board has been made with corn husk fiber (CHF), water hyacinth fiber, and wood sawdust using epoxy resin as an adhesive. The composition of each fiberwas varied, and physical tests (density, porosity, water absorption, and thickness expansion) and mechanical tests (modulus of elasticity (MOE), modulus of rupture (MOR), and compressive strength) were carried out, and microstructure was analyzed using SEM-EDX. The results of testing the physical and mechanicalproperties with optimum results were density of 1.03 g/cm3, porosity of 10.48%, water absorption capacity of 10.22%, thickness expansion of 2.91%, MOR 256.05kgf/cm2, MOE 228 kgf/cm2 and compressive strength of 3.19 MPa. The results showed that the physical (porosity, absorption, and thickness expansion) and mechanical (MOR and compressive strength) tests met the standards of SNI 03-2105-2006, while the MOE test did not meet the standards. For density testing, it complies with SNI 01-4449-2006 standards. The composite board can be used as a substitute for wood for furniture materials.
Mapping the landscape of WCO biolubricant studies: A Comprehensive bibliometric review with vosviewer Ilmi, Ilmi; Suherman, Suherman; Frida, Erna; Binti Mohd Zulkifli, Nurin Wahidah; Jufrizal, Jufrizal
Mechanical Engineering for Society and Industry Vol 4 No 3 (2024): Special Issue on Technology Update 2024
Publisher : Universitas Muhammadiyah Magelang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31603/mesi.12549

Abstract

This study explores the growing field of biolubricants as sustainable alternatives to petroleum-based lubricants. This paper highlights the gap in the current literature regarding biolubricants from Waste Cooking Oil (WCO) using a mixed-methods approach of bibliometric analysis and systematic literature review (SLR). A bibliometric analysis was conducted using data from the Scopus database, covering 650 publications from 2000 to 2024. Furthermore, a systematic literature review provides a comprehensive analysis of the methods used for synthesizing biolubricants from WCO, particularly evaluating the types of catalysts and methods employed that influence the physicochemical properties. The findings show a significant increase in research activity from 2018 to 2022, with Malaysia and India leading in this area. Key research trends identified include catalysts, oxidation stability, and transesterification processes. Optimal conditions for biolubricant production from WCO were achieved using an Amberlyst catalyst at 81°C, yielding a 99% conversion rate. These results highlight the potential of WCO-derived biolubricants to support more sustainable industrial applications. This study is the first to combine bibliometric analysis and systematic literature review methods to provide a comprehensive overview of research on WCO-based biolubricant production. Through a systematic review of existing studies, this research provides a useful resource for industry professionals and renewable energy policymakers in their efforts.
Exploring Synergies: Tailoring Electrical Conductivity in Novel Corn Starch and Natural Rubber Polymer Composites through Varied Carbon Additives Fiqri, Miftahul; Humaidi, Syahrul; Frida, Erna; Estananto, Estananto
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 25 No. 02 (2024): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/eksakta/vol25-iss02/500

Abstract

Conductive polymer composites were synthesized using a crosslinking method, enhancing conductivity through the incorporation of carbon additives. Non-conductive natural polymers, corn starch, and natural rubber were blended with carboxymethyl cellulose (CMC) as a crosslinking agent, enhancing polymer bonding. CMC also served as a compatibilizer, improving corn starch properties. Glycerol acted as a plasticizer, enhancing flexibility and processability. Addition of carbon nanotube (CNT), graphite, and carbon foam yielded low-density materials, with carbon foam providing optimal porosity. The crystalline properties mirrored the added conductive carbon, while the chemical structure remained unchanged. At 0.1 Hz, electrical conductivity varied: 1.192 x 10-7 S.cm-1 (no carbon), 6.123 x 10-4 S.cm-1 (CNT), 7.656 x 10-4 S.cm-1 (graphite), and 3.134 x 10-2 S.cm-1 (carbon foam). Graphite incorporation demonstrated an electrical conductivity of 7.838 x 10-4 S.cm-1. The introduced carbon additives facilitated a conductive pathway in corn starch-based polymer composites, elevating material conductivity.
Overcurrent effects on copper insulated PVC cables and fire resistance via thermal imaging and macrostructure analysis Ali Akbar, Muhammad; Humaidi, Syahrul; Tarigan, Kerista; Ramdan, Dadan; Frida, Erna; Siregar, Yulianta
Bulletin of Electrical Engineering and Informatics Vol 14, No 2: April 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v14i2.8628

Abstract

This study investigates the effects of overcurrent on copper (Cu) insulated polyvinyl chloride (PVC) cables, focusing on their thermal behavior and fire resistance. We utilized thermal imaging, macrostructural analysis, and Joule heating calculations to evaluate six cable samples subjected to various currents. Results showed that with increasing current, the temperature of the cables rose significantly. For example, the CC0 sample, with no current, had a temperature of 36 °C, while the CC110 sample, subjected to 110 A, reached 1,091 °C. Joule heating calculations indicated energy values ranging from 0 J for the CC0 sample to 7,260,000 J for the CC110 sample. Physical observations included minor deformations at 253 °C and complete insulation loss at 1,091 °C. These findings emphasize the critical need for managing overcurrent to prevent severe cable damage and enhance system safety. This research provides practical insights for optimizing cable design and improving thermal management, offering valuable contributions to electrical engineering practices.
UTILIZATION OF ACTIVATED CARBON FROM ELEPHANT GRASS (PENNISETUM PURPEREUM) AND MANGANESE DIOXIDE AS SUPERCAPACITOR ELECTRODES Fathi Marzuqi; Erna Frida; Syahrul Humaidi
Multidiciplinary Output Research For Actual and International Issue (MORFAI) Vol. 5 No. 4 (2025): Multidiciplinary Output Research For Actual and International Issue
Publisher : RADJA PUBLIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54443/morfai.v5i4.3146

Abstract

The growing need for sustainable and eco-friendly energy storage solutions has led to advancements in high-performance supercapacitors with extended cycle life. This research explores the fabrication of composite electrodes using activated carbon derived from elephant grass (Pennisetum purpureum) combined with manganese dioxide (MnO₂). The carbon material was produced through chemical activation with potassium hydroxide (KOH) and subsequent physical activation using carbon dioxide (CO₂). MnO₂ was incorporated into the activated carbon at various weight ratios (10:0, 7:3, 5:5, 3:7, and 0:10). Morphological and elemental analyses were performed using SEM-EDS, Meanwhile, the electrochemical performance was evaluated using galvanostatic charge-discharge (GCD) tests and electrochemical impedance spectroscopy (EIS). Of all the samples evaluated, the composite containing a 3:7 ratio of carbon to MnO₂ exhibited the highest specific capacitance, reaching 198.51 F/g, highlighting the beneficial interaction between double-layer capacitance and pseudocapacitance. These findings suggest that elephant grass-derived carbon, when effectively combined with MnO₂, presents a cost-effective and environmentally friendly option for next-generation supercapacitor electrodes.
METHYL RED ADSORPTION BY BIODEGRADABLE POLYCAPROLACTONE/RICE HUSK ASH/TiO2 NANOFILLER HYBRID BIONANOCOMPOSITES: SYNTHESIS AND CHARACTERIZATION Armelia Yuniani; Erna Frida; Syahrul Humaidi
Multidiciplinary Output Research For Actual and International Issue (MORFAI) Vol. 5 No. 6 (2025): Multidiciplinary Output Research For Actual and International Issue
Publisher : RADJA PUBLIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54443/morfai.v5i6.3470

Abstract

The contamination of wastewater by synthetic dyes such as Methyl Red poses serious environmental and health risks, necessitating effective remediation methods. This study investigates the synthesis and characterization of hybrid bionanocomposites composed of polycaprolactone (PCL), rice husk ash (RHA), and titanium dioxide (TiO2) nanoparticles for the efficient degradation of Methyl Red (MR) dye. The composites were prepared using a co-precipitation method for the incorporation of nano-RHA and TiO2. Characterization of the bionanocomposites was conducted through scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and photodegradation tests. XRD analysis, using the Scherrer equation, revealed crystallite sizes ranging from 19.01 nm (composite S0) to 27.25 nm (composite S2). FTIR spectra showed characteristic absorption peaks corresponding to Ti–O (669.29 cm⁻¹), Si–O (970.19 cm⁻¹), and C–H (2960.73 cm⁻¹) bonds. The photodegradation results indicated a significant improvement in dye adsorption, with the highest degradation efficiency observed in composite S1, achieving 93.55% degradation after 45 hours of UV irradiation. The degradation efficiencies of S0, S1, and S2 were found to be 87.1%, 93.55%, and 25.81%, respectively, under the same conditions. The incorporation of TiO2 and RHA in PCL significantly enhanced its photocatalytic activity. This study demonstrates the potential of these bionanocomposites as sustainable materials for textile wastewater treatment
Implementation of Wet Coffee Peeling Machine In Barus Julu Village Kecamatan Barus Jahe Karo District Erna Frida; Timbangen Sembiring; Ferry Rahmat A. Bukit; Ivo Andika Hasugian
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 5 No. 2 (2020): ABDIMAS TALENTA : Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/abdimastalenta.v5i2.4884

Abstract

The application of the wet coffee peeler has been implemented in Barusjulu Village, Barusjahe District, Karo Regency, the method used is to make and assemble a wet coffee peeler with a machine, so that coffee peeling can be done quickly. Monitoring is carried out to ensure that farmers can use their tools and functions properly. From the results of using a wet coffee peeler in Barusjulu Village, it can be concluded that the performance of the tool works well, efficiently and coffee farmers are helped by the wet coffee peeler.
Processing Durian Skin Into Compost Using Enumeration Machine Technology in Sungai Raya Village Erna Frida; Bukit, Ferry Rahmat Astianta; Siregar, Achmad Husein
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 7 No. 1 (2022): ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1241.771 KB) | DOI: 10.32734/abdimastalenta.v7i1.6893

Abstract

Dairi Regency is the largest durian fruit producer in North Sumatra Province with a production of 23 thousand tons per year. One of the largest durian-producing villages in Dairi Regency is Sungai Raya Village. The estimated volume of durian skin waste produced in North Sumatra is 332,712 tons of durian skin per year, this can be seen from the large amount of durian skin waste that accumulates on the side of the road, in rivers, and farmers' gardens. Given the large volume of durian skin, it takes an effort to process durian skin waste into compost that can be used by farmers and can improve the welfare of farmers. The solution for processing durian skin is to build a community-based processing unit for processing durian skin into community-based compost by involving farmer groups. To carry out efforts to manage durian skin waste, a simple tool is needed that functions as a durian skin chopper as a basic material for compost. From the results of the durian skin counting and the dissemination of fertilizer making, farmer groups and the community have been able to make fertilizer from durian skin so that it can increase the income of the population.
Processing Solid Waste from Cabbage Vegetables and Cow Rumen Contents into Liquid Organic Fertilizer (LOF) in Semangat Village, Merdeka District, Karo Regency Erna Frida; Vinolina, Noverita Sprinse; Bukit, Ferry Rahmat Astianta; Bukit, Bunga Fisikanta
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 9 No. 1 (2024): ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/abdimastalenta.v9i1.9568

Abstract

The manufacture of Liquid Organic Fertilizer (LOF) has been carried out with simple methods and equipment in the Semangat Village, Merdeka District, Karo Regency. LOF is made by utilizing waste produced by farmers at the time of post-harvest vegetables such as cabbage, cabbage, carrot leaves and other vegetables. These vegetables can be used because 90% is a liquid. The chopped cabbage waste is mixed with cow rumen and fermented for two weeks, the resulting leachate is fermented again by adding coconut water and LOF is produced which is ready to be used by farmers. With this LOF, farmers can be helped in reducing chemical fertilizers which are quite expensive, so that the costs needed by farmers are less and LOF can increase nutrients in the soil.
Co-Authors Alfonsius Chrisandy Pratama Siregar Aliakbar, Muhammad Armelia Yuniani Atikah, Nisrina Binti Mohd Zulkifli, Nurin Wahidah Bukit, Bunga fisikanta Bukit, Ferry Rahmat Astianta Bunga Fisikanta Bukit S.Si, M.Si Dadan Ramdan Darnianti Darnianti Dharma Sembiring Estananto Eva Marlina Ginting Eva Marlina Ginting Fathi Marzuqi Ferry Rahmat A. Bukit Ferry Rahmat A. Bukit Fiqri, Miftahul Ganda Parasian Damanik Ilmi Ilmi, Ilmi Imanuel P. Tua Panggabean Ivo Andika Hasugian Jamal Pandia Jufrizal Jufrizal Khairina Fitri Marhaposan Situmorang Marhaposan Situmorang Marhaposan Situmorang Martha Marchofinece Padang Marzuki Sinambela Marzuki Sinambela Mega Sirait Nasution, Yulianti Noverita Sprinse Vinolina Noviyunida Noviyunida Nurdin Bukit Nurdin Bukit Nurdin Bukit Perdinand Sinuhaji Pintor Simamora Pratyka, Venna Sally Irvina Ritonga Santy Meilisa Manurung Siregar, Achmad Husein Siregar, Shinta Marito Suherman Suherman, Suherman Susilawati Susilawati Syahrul Humaidi Syahrul Humaidi Syahrul Humaidi, Syahrul Syiska Yana Tambunan, Nensy Nindy Tarigan, Kerista Theresia Grefyolin Simbolon Timbangen Sembiring Tresia Sinaga Vijai Aleksander Ginting Waslina Rangkuti Yahya Darmawan Yahya Darmawan Yahya Darmawan Yulianta Siregar